5-Methyl-1(3H)-isobenzofuranone
5-甲基-1(3H)-异苯并呋喃酮
Also known as: 5-Methylphthalide, 5-Methyl-1,3-dihydroisobenzofuran-1-one, 5-Methyl-3H-isobenzofuran-1-one, 5-methyl-3H-2-benzofuran-1-one, 1(3H)-Isobenzofuranone, 5-methyl-, 5-Methylisobenzofuran-1(3H)-one
5-Methyl-1(3H)-isobenzofuranone (CAS 54120-64-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H8O2 and a molecular weight of 148.15900 g/mol. It is also known as 5-Methylphthalide, 5-Methyl-1,3-dihydroisobenzofuran-1-one and 5-Methyl-3H-isobenzofuran-1-one. Key properties include a boiling point of 329.2ºC at 760 mmHg, a density of 1.211g/cm3 and a flash point of 136.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 54120-64-8
- Jingsj CID
- J-22045-3
- Molecular Formula
- C9H8O2
- Chinese Name
- 5-甲基-1(3H)-异苯并呋喃酮
- Molecular Weight
- 148.15900 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 329.2ºC at 760 mmHg |
|---|---|
| Density | 1.211g/cm3 |
| Flash Point | 136.1ºC |
Frequently Asked Questions
What is the CAS number of 5-Methyl-1(3H)-isobenzofuranone?
The CAS number of 5-Methyl-1(3H)-isobenzofuranone is 54120-64-8.
What are the molecular formula and molecular weight of 5-Methyl-1(3H)-isobenzofuranone?
5-Methyl-1(3H)-isobenzofuranone has molecular formula C9H8O2 and molecular weight 148.15900 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methyl-1(3H)-isobenzofuranone (CAS 54120-64-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-22045-3 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.